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Science 27 October 2000:
Vol. 290. no. 5492, p. 669
DOI: 10.1126/science.290.5492.669b
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A particle moving below a critical velocity through a superfluid can do so unhindered, but above the critical velocity a vortex, or a superposition of normal (viscous) and superfluid states, is created. Kivotides et al. (p. 777) report model results on the dynamics of the vortex evolution which suggest that the structure may be more complicated than initially thought. A triple-ring structure develops in which the superfluid vortex ring is accompanied by not one, but two normal-fluid vortex rings. This coupled ring structure is coherent and dissipative.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)